Guitar headstock



FIG. 1 is a front right perspective view of a guitar headstock embodying my new design;

FIG. 2 is a rear left perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof; the right side view being a minor image thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof. 

The ornamental design for a guitar headstock, as shown and described. 